OpeningTree is a chess opening book that lets users navigate the tree of openings and Stockfish 10 engine analysis is available including multiple lines of analysis if the user wants. Chess games can be loaded from PGN game files to check against the book or to just use the app as a PGN reader.

The opening book is made from about 345,000 games from the last ten years with both players rated 2300 and up. The stats next to moves are how many games resulted in wins, draws or losses. The concept originated from computer opening books as if we can open up the book and see the moves that people play in response to chess opening positions.

4.6
Added Black color to Board Background and Move Table Background choices so black there as well as black for the already Analysis choice users can get a Dark Mode

Actions men(Acciones) translated into Spanish including About OpeningTree

Updated from Stockfish 10 to Stockfish 11
Made 32 bit stockfish default for new users but it can be updated to 64 bit in settings.
Settings layout updated and made scrollable so if bottom options cut off on some devices they can be scrolled to